Quelle CustomLogManager.java Sprache: JAVA

/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

import java.io.*;
import java.util.*;
import java.util.logging.*;

/*
* Custom LogManager implementation to verify that the implementation delegates
* to the LogManager subclass to register both system logger and user logger.
*
* The LogManager implementation is the one configuring the logger's property
* such as level, handler, etc.
*/
public class CustomLogManager extends LogManager {
    static LogManager INSTANCE;
    Map<String,Logger> namedLoggers = new HashMap<>();
    Properties props = initConfig();
    public CustomLogManager() {
        if (INSTANCE != null) {
            throw new RuntimeException("CustomLogManager already created");
        }
        INSTANCE = this;
    }

    private boolean useParentHandlers(String loggerName) {
        String s = props.getProperty(loggerName + ".useParentHandlers");
        if (s == null)
            return true;   // default is true

        s = s.toLowerCase();
        if (s.equals("true") || s.equals("1")) {
           return true;
        } else if (s.equals("false") || s.equals("0")) {
           return false;
        }
        return true;
    }

    public synchronized boolean addLogger(Logger logger) {
        String name = logger.getName();
        if (namedLoggers.containsKey(name)) {
            return false;
        }
        namedLoggers.put(name, logger);
        // set level
        if (props.get(name + ".level") != null) {
            logger.setLevel(Level.parse(props.getProperty(name + ".level")));
        }
        // add handlers
        if (props.get(name + ".handlers") != null && logger.getHandlers().length == 0) {
            logger.addHandler(new CustomHandler());
        }
        if (!useParentHandlers(name)) {
            logger.setUseParentHandlers(false);
        }
        // add parent loggers
        int ix = 1;
        for (;;) {
            int ix2 = name.indexOf(".", ix);
            if (ix2 < 0) {
                break;
            }
            String pname = name.substring(0, ix2);
            if (props.get(pname + ".level") != null ||
                props.get(pname + ".handlers") != null) {
                // This pname has a level/handlers definition.
                // Make sure it exists.
                //
                // The test doesn't set the parent for simplicity.
                if (!namedLoggers.containsKey(pname)) {
                    Logger parent = Logger.getLogger(pname);
                    if (!useParentHandlers(pname)) {
                        parent.setUseParentHandlers(false);
                    }
                }
            }
            ix = ix2 + 1;
        }
        return true;
    }

    public synchronized Logger getLogger(String name) {
        return namedLoggers.get(name);
    }

    public synchronized Enumeration<String> getLoggerNames() {
        return Collections.enumeration(namedLoggers.keySet());
    }

    public String getProperty(String name) {
        return props.getProperty(name);
    }

    public void readConfiguration() {
        // do nothing
    }

    public void readConfiguration(InputStream ins) {
        // do nothing
    }

    private Properties initConfig() {
        Properties props = new Properties();
        props.put(".level", "CONFIG");
        props.put("CustomLogManagerTest.level", "WARNING");
        props.put("CustomLogManagerTest.handlers", "CustomLogManager$CustomHandler");
        props.put("SimpleLogManager.level", "INFO");
        props.put("SimpleLogManager.handlers", "CustomLogManager$CustomHandler");
        props.put("CustomLogManager$CustomHandler.level", "WARNING");
        props.put(".handlers", "CustomLogManager$CustomHandler");
        props.put("org.foo.bar.level", "SEVERE");
        props.put("org.foo.bar.useParentHandlers", "true");
        props.put("org.foo.handlers", "CustomLogManager$CustomHandler");
        props.put("org.foo.useParentHandlers", "false");
        props.put("org.openjdk.level", "SEVERE");
        props.put("org.openjdk.handlers", "CustomLogManager$CustomHandler");
        props.put("org.openjdk.core.level", "INFO");
        props.put("org.openjdk.core.useParentHandlers", "false");

        return props;
    }
    public static void checkLogger(String name) {
        checkLogger(name, null);
    }

    public static void checkLogger(String name, String resourceBundleName) {
        Logger logger = INSTANCE.getLogger(name);
        if (logger == null) {
            throw new RuntimeException("Logger \"" + name + "\" not exist");
        }
        System.out.format("Logger \"%s\" level=%s handlers=%s resourcebundle=%s useParentHandlers=%s%n",
            name, logger.getLevel(),
            Arrays.toString(logger.getHandlers()),
            logger.getResourceBundleName(),
            logger.getUseParentHandlers());
        String rb = logger.getResourceBundleName();
        if (rb != resourceBundleName && (rb == null || rb.equals(resourceBundleName))) {
            throw new RuntimeException("Logger \"" + name +
                "\" unexpected resource bundle: " + rb);
        }

        String value = INSTANCE.getProperty(name + ".level");
        String level = logger.getLevel() != null ? logger.getLevel().getName() : null;
        if (level != value && (level == null || level.equals(value))) {
            throw new RuntimeException("Logger \"" + name + "\" unexpected level: " + level);
        }

        Handler[] handlers = logger.getHandlers();
        String hdl = INSTANCE.getProperty(name + ".handlers");
        if ((hdl == null && handlers.length != 0) ||
            (hdl != null && handlers.length != 1)) {
            throw new RuntimeException("Logger \"" + name + "\" unexpected handler: " +
                Arrays.toString(handlers));
        }

        String s = INSTANCE.getProperty(name + ".useParentHandlers");
        boolean uph = (s != null && s.equals("false")) ? false : true;
        if (logger.getUseParentHandlers() != uph) {
            throw new RuntimeException("Logger \"" + name + "\" unexpected useParentHandlers: " +
                logger.getUseParentHandlers());
        }
        checkParents(name);
    }

    private static void checkParents(String name) {
        int ix = 1;
        for (;;) {
            int ix2 = name.indexOf(".", ix);
            if (ix2 < 0) {
                break;
            }
            String pname = name.substring(0, ix2);
            if (INSTANCE.getProperty(pname + ".level") != null ||
                INSTANCE.getProperty(pname + ".handlers") != null) {
                // This pname has a level/handlers definition.
                // Make sure it exists.
                checkLogger(pname);
            }
            ix = ix2 + 1;
        }
    }

    // only CustomLogManager can create an instance of CustomHandler
    private class CustomHandler extends StreamHandler {
    }
}

quality90%

¤ Dauer der Verarbeitung: 0.10 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.